Oh -- a storyboard! That's always an interesting use-case for Krita, and one that I hope we'll support even better by 2.9 or 3.0. So don't hesitate to give input on what would make storyboarding easier for you.

well I can explain my experience at least at creating this storyboard itself. I am still very new to krita and the arts in general so I may have trouble in my experience that could have been solved by means that i do not know about yet, but here goes what happend to me.

things I went through:

1-creating a bounding box with correct sizing ratio (16:9). I created in a vector layer a box and sized it up to 160px x 90px. and did a keep ratio scale with the transform(+shift). at the end it seemed to not have retain the desired ratio to my supprise. I must have did a mistake I think myself here but since I already had alot of artwork made when I noticed it I just disregarded it at the end.

2-Aligning all boxes of want and their placement. I was making a sort of spread sheet before starting (I made my custom storyboard sheet, well just because) with all boxes aligned on given points. I had a hard time to align them up without having a vertical or horizontal guideline. Surelly people have spoken of this already. I managed to align but it took me a good while to see how to get there at first and it was not really vector percise just pixel percise. nothing major though.

3-I found the text tool to be little maleable to work, I perfered to write things down by hand than use the text tools since it was really faster than editing the box again, became more artsy too in that process though. I was thinking at a point if I could select a text box and then write down the text on a selection sensitive menu (docker or options), instead of writing directlley on the screen, I was thinking this because my text had to be revised a couple of times and see the feel of the image in conjunction with the words and them to the time delivery. I had to do a last text review that is not on the images because it takes too much time to write down so I had in the end a *txt file with the same lines of text. perhaps a menu to recieve the text and option and i would just edit the graphical aspect on screen of the document, it would seem a cool way to make it faster. I find PS reliable but very boring because it can lag the render of the text while editing if i do something too funky or I miss click something.

4-Each time i started drawing a new image I had to sketch out the guidelines of composition of the frame. a bit boring having to have a layer for just that, krita's layer blocks are a bit massive screen space wise and I that love to have lots of layers to compose saddley, in the end found myself with ALOT of layers, I think this storyboard I had like almost 200 layers or something, not to mention they are a bit confusing as they dropdown unlike PS I must admit, many times I clicked and edited layers I did not want. Either way I am used to having a camera with the composition guidelines so I can frame as I move in space and see the animation I have on the scene, so I made composition guides before I drawed anything at all. here is what I mean: https://www.youtube.com/watch?v=1kX9MbpWIK0 I think being able to create a geometric form with a linear resizable pattern(since there are different camera ratios) inside of it of some kind would be cool, and being able to toggle it on and off somehow with a transparency.

5-A thing that really helped me was having a big bunch of good default textures for the brushes. it made things not so boring.

6-Gradients start to become a bit stiff after a while. I wanted to make a weird gradient composition fast but had only the pixel gradient options which I find all to limiting. since there are vector layers I think exploring gradient options like Adobe Illustrator would be cool. like connecting 2 shapes with a given increment or doing a mesh grid. two gradient options I find amazing on vector based apps. I believe krita may hold the ability to sometime do this too.

Well I guess these where the points crossing my mind when I did this storyboard. I will try and paste my near complete storyboard here to see what I spoke of. here or on the next post.